Remove EOL Fedora 37/38

[VannTen]

What would you like to be added

Both Fedora 37 and 38 are EOL (https://docs.fedoraproject.org/en-US/releases/eol/#_unsupported_fedora_linux_releases)
We should remove them.

We can replace them by 39 and 40, that could be done at the same time or in a follow-up (or even before, does not really matter)

This would need:

1. remove them from CI, testcases, etc
2. remove from documentation
3. remove special handling in kubespray roles
4. cleanup/refactor following point 3 => this steps is not absolutely necessary, but at the very least cleanup opportunities should be marked with TODO items.

Why is this needed

Less code, less bugs, happy maintainers.

[VannTen]

/good-first-issue

[k8s-ci-robot]

@VannTen:
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[yankay]

The images need to be built and pushed to quay so the CI can run .
I'll help do this when someone is working for the PR.

[VannTen]

/remove-kind feature /kind cleanup

[tico88612]

Support for Fedora 39/40; I opened a separate issue #11548.

[occase]

/assign

[tico88612]

@occase Are you still working on this?

[occase]

@tico88612 I thought I had fixed it. Still new at this..
Do I need to do anything else?
I just deleted my branch bc it looks like it says it's fixed.

[tico88612]

@occase you should open the PR to this repo, not on your fork repo.

[tico88612]

In addition to changing README.md, this PR also needs to delete files with Fedora 37/38.

[tico88612]

/unassign @occase
/assign